On 12/03/2010 15:18, Jon Hardcastle wrote:
--- On Fri, 12/3/10, Asdo <asdo@xxxxxxxxxxxxx> wrote:
From: Asdo <asdo@xxxxxxxxxxxxx>
Subject: Reshaping the length of devices
To: "linux-raid" <linux-raid@xxxxxxxxxxxxxxx>
Date: Friday, 12 March, 2010, 15:15
I am wondering... is it possible to
reshape the length of the underlying devices with MD raid?
I mean like in the case one buys larger disks: after moving
the raid partitions to the new disks half of them is still
free. So one might want to extend the raid partitions to the
end of the disks instead of creating another array in the
free space.
I have searched the linux-raid mailing list history but I
couldn't find this topic.
Thanks in advance
As long as the size of ALL underlying devices have increased you can --grow=MAX to the a multiple of the now smallest drive.
Hmm, that reminds me I was meaning to ask - before I have to go to a
customer's premises and try it - if I have a CentOS 5 system with 0.90
metadata and type fd partitions with RAID-5 over 3 discs, and I want to
grow it by replacing the drives, if I dd small partitions onto larger
ones and reboot, will the system recognise the RAID-5 - which now has
its metadata somewhere in the middle of the paritions not at the end -
so that I can then --grow?
Cheers,
John.
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